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authorjaseg <git@jaseg.de>2022-01-09 19:59:15 +0100
committerjaseg <git@jaseg.de>2022-01-09 19:59:15 +0100
commit4d77937f01e4a7561f412a07e1e2c5a5dba0fc49 (patch)
tree5f9d0ab2fb8cd7f57ca17dd8abb107b39d40c52b /gerbonara/gerber/graphic_primitives.py
parentd6f0f0cff4fa56af7754a12c87fb6bc10e212422 (diff)
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Make bounding box tests pass
Diffstat (limited to 'gerbonara/gerber/graphic_primitives.py')
-rw-r--r--gerbonara/gerber/graphic_primitives.py25
1 files changed, 17 insertions, 8 deletions
diff --git a/gerbonara/gerber/graphic_primitives.py b/gerbonara/gerber/graphic_primitives.py
index 98b8aa1..4e176b2 100644
--- a/gerbonara/gerber/graphic_primitives.py
+++ b/gerbonara/gerber/graphic_primitives.py
@@ -40,6 +40,9 @@ def add_bounds(b1, b2):
max_x, max_y = max_none(max_x_1, max_x_2), max_none(max_y_1, max_y_2)
return ((min_x, min_y), (max_x, max_y))
+def rad_to_deg(x):
+ return x/math.pi * 180
+
@dataclass
class Circle(GraphicPrimitive):
x : float
@@ -174,11 +177,14 @@ def point_line_distance(l1, l2, p):
return abs((x2-x1)*(y1-y0) - (x1-x0)*(y2-y1)) / length
def svg_arc(old, new, center, clockwise):
+ print(f'{old=} {new=} {center=}')
r = point_distance(old, new)
d = point_line_distance(old, new, center)
- sweep_flag = int(clockwise)
+ # invert sweep flag since the svg y axis is mirrored
+ sweep_flag = int(not clockwise)
large_arc = int((d > 0) == clockwise) # FIXME check signs
- return f'A {r:.6} {r:.6} {large_arc} {sweep_flag} {new[0]:.6} {new[1]:.6}'
+ print(f'{r=:.3} {d=:.3} {sweep_flag=} {large_arc=} {clockwise=}')
+ return f'A {r:.6} {r:.6} 0 {large_arc} {sweep_flag} {new[0]:.6} {new[1]:.6}'
@dataclass
class ArcPoly(GraphicPrimitive):
@@ -206,6 +212,7 @@ class ArcPoly(GraphicPrimitive):
else:
line_bounds = (min(x1, x2), min(y1, y2)), (max(x1, x2), max(y1, y2))
bbox = add_bounds(bbox, line_bounds)
+ return bbox
def __len__(self):
return len(self.outline)
@@ -251,13 +258,14 @@ class Arc(GraphicPrimitive):
y1 : float
x2 : float
y2 : float
+ # absolute coordinates
cx : float
cy : float
clockwise : bool
width : float
def bounding_box(self):
- r = self.w/2
+ r = self.width/2
endpoints = add_bounds(Circle(self.x1, self.y1, r).bounding_box(), Circle(self.x2, self.y2, r).bounding_box())
arc_r = point_distance((self.cx, self.cy), (self.x1, self.y1))
@@ -272,16 +280,16 @@ class Arc(GraphicPrimitive):
x2 = self.x2 + dx/arc_r * r
y2 = self.y2 + dy/arc_r * r
- arc = arc_bounds(x1, y1, x2, y2, cx, cy, self.clockwise)
+ arc = arc_bounds(x1, y1, x2, y2, self.cx, self.cy, self.clockwise)
return add_bounds(endpoints, arc) # FIXME add "include_center" switch
def to_svg(self, tag, color='black'):
arc = svg_arc((self.x1, self.y1), (self.x2, self.y2), (self.cx, self.cy), self.clockwise)
return tag('path', d=f'M {self.x1:.6} {self.y1:.6} {arc}',
- style=f'stroke: {color}, stroke-width: {self.width:.6}; stroke-linecap: round')
+ style=f'stroke: {color}, stroke-width: {self.width:.6}; stroke-linecap: round; fill: none')
-def svg_rotation(angle_rad):
- return f'rotation({angle_rad/math.pi*180:.4})'
+def svg_rotation(angle_rad, cx=0, cy=0):
+ return f'rotate({float(rad_to_deg(angle_rad)):.4} {float(cx):.6} {float(cy):.6})'
@dataclass
class Rectangle(GraphicPrimitive):
@@ -313,7 +321,8 @@ class Rectangle(GraphicPrimitive):
def to_svg(self, tag, color='black'):
x, y = self.x - self.w/2, self.y - self.h/2
- return tag('rect', x=x, y=y, w=self.w, h=self.h, transform=svg_rotation(self.rotation), style=f'fill: {color}')
+ return tag('rect', x=x, y=y, width=self.w, height=self.h,
+ transform=svg_rotation(self.rotation, self.x, self.y), style=f'fill: {color}')
@dataclass
class RegularPolygon(GraphicPrimitive):